VEGA VEGAPULS SR 68 4 … 20 mA_HART two-wire - Manual (Page 72)

72
11 Supplement
VEGAPULS SR 68 • 4 … 20 mA/HART two-wire
38294-EN-130624
Specifications apply also to the current output
Temperature drift - Current output
±0.03 %/10 K relating to the 16 mA span max. ±0.3 %
Deviation on the current output through
analogue/digital conversion
< ±15 µA
Deviation on the current output due to
strong, high frequency electromagnetic
fields acc. to EN 61326
< ±150 µA
Characteristics and performance data
Measuring frequency
K-band (26 GHz technology)
Measuring cycle time approx. 700 ms
Step response time 2) ≤ 3 s
Beam angle 3)
Ʋ Horn antenna ø 40 mm (1.575 in) 20°
Ʋ Horn antenna ø 48 mm (1.89 in) 15°
Ʋ Horn antenna ø 75 mm (2.953 in) 10°
Ʋ Horn antenna ø 95 mm (3.74 in) 8°
Ʋ Parabolic antenna 3°
Emitted HF power (depending on the parameter adjustment) 4)
Ʋ Average spectral transmission power
density
-14 dBm/MHz EIRP
Ʋ Max. spectral transmission power
density
+43 dBm/50 MHz EIRP
Ʋ Max. power density in a distance of
1 m
< 1 µW/cm²
Ambient conditions
Ambient, storage and transport tempera-
ture
-40 … +80 °C (-40 … +176 °F)
Process conditions
For the process conditions, please also note the specifications on the type label. The lowest value
always applies.
Seal Antenna impedance
cone
Process temperature (measured on the process
fitting)
FKM (SHS FPM 70C3
GLT)
PTFE -40 … +130 °C (-40 … +266 °F)
FFKM (Kalrez 6375) PFFE -20 … +130 °C (-4 … +266 °F)
PEEK -20 … +250 °C (-4 … +482 °F)
FFKM (Kalrez 2035) PFFE -15 … +130 °C (5 … +266 °F)
PEEK -15 … +210 °C (5 … +410 °F)
2) Time span after a sudden measuring distance change by max. 0.5 m in liquid applications, max 2 m with bulk
solids applications, until the output signal has taken for the first time 90 % of the final value (IEC 61298-2).
3) Outside the specified beam angle, the energy of the radar signal has a level which is reduced by 50 % (-3 dB)
4) EIRP: Equivalent Isotropic Radiated Power